Question

Which of the following is an even function?

f(x) = x1
Of(x) = x2 - 1
Of(x) = -3x
O Rx) = 3/8

Answer 1

`f(x) = x^(2) - 1`

Explanation:

The definition of even function is:
`f(x) = f(-x)`

I am going to assume the second option is
`f(x) = x^(2) - 1` and the answer.

`f(x) = x^(2) - 1\\f(-x) = (-x)^(2) - 1 = x^(2)-1`